Home / 15,221.20-21,007.56-8,936.40

Finding the Fourth Proportional to 15,221.20, 21,007.56 and 8,936.40

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Solution

The fourth proportional to 15,221.20, 21,007.56 and 8,936.40 is: 12,333.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.20 : 21,007.56 = 8,936.40 : x
  2. Step 2: Convert to fraction form
    15,221.20/21,007.56 = 8,936.40/x
  3. Step 3: Cross multiply
    15,221.20x = 21,007.56 × 8,936.40
  4. Step 4: Simplify right side
    15,221.20x = 187,731,959.18
  5. Step 5: Solve for x
    x = 187,731,959.18/15,221.20
  6. Step 6: Final answer
    x = 12,333.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.